package com.itheima.knowledge.domain;

/**
 * @ClassName: DataDemo
 * @Description:
 * @author: Yrd
 * @date: 2021-11-13 17:30
 */
public class DataDemo {
    public static void main(String[] args){
        Data data = new Student();
        data.add("xiaoLi");
        new peraon();
        String s = ((Student) data).showStudent();
        System.out.println(s);
        System.out.println(((Student) data).studentOwner());
    }
}

class peraon{

}
